The PURFIELD 4S1P 14.4V 2800mAh Li-ion Battery is designed for robot vacuums like the Conga Excellence 990/1090, Ecovacs Deebot N79S/N79/DN622, and Eufy Robovac 11S/12/35C. It offers extended runtime, optimized voltage stability, and a durable 4S1P cell configuration, ensuring compatibility and …